As tangelos go, the Minneola tends to be pretty large and is usually bell or pear-shaped. Diameter of the fruit averages about 3 inches (7.62 cm), though some can grow a bit larger. The peel is somewhat thin, but like most tangelos and mandarin oranges, it is pretty easy to peel.
Space Exploration Definition. space exploration. 1  Space exploration is the use of astronomy and space technology to explore outer space. 2  Physical exploration of space is conducted both by human spaceflights and by robotic spacecraft.
A space probe is a spacecraft which travels into space with no people in it, usually in order to study the planets and send information about them back to earth. Its rings were discovered by telescope from Earth, but space probes later found that spectacular rings surround some other planets. The Pioneer probes have on board ultra-violet instruments which are measuring light that we can't measure on the earth.